public void GetByIdTest()
        {
            var currencyRateServiceMock = new Mock <ICurrencyRateByTimeService>();

            currencyRateServiceMock.Setup(s => s.GetById(1)).ReturnsAsync(_currencyRates[0]);

            var currencyRateController = new CurrencyRateByTimeController(currencyRateServiceMock.Object);

            var result = currencyRateController.GetCurrencyRateByTime(1).Result.Queryable.Single();

            Assert.AreEqual(result.Id, _currencyRates[0].Id);
        }
        public void GetByIncorrectId()
        {
            var currencyRateServiceMock = new Mock <ICurrencyRateByTimeService>();

            currencyRateServiceMock.Setup(s => s.GetById(It.IsAny <int>())).ReturnsAsync((int s) => null);

            var currencyRateController = new CurrencyRateByTimeController(currencyRateServiceMock.Object);

            var rateByTimeResult = currencyRateController.GetCurrencyRateByTime(1).Result.Queryable.Single();

            Assert.IsNull(rateByTimeResult);

            var currencyResult = currencyRateController.GetCurrency(1).Result.Queryable.Single();

            Assert.IsNull(currencyResult);

            var bankDepartmentResult = currencyRateController.GetBankDepartment(1).Result.Queryable.Single();

            Assert.IsNull(bankDepartmentResult);
        }